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Biology CH25 Animal Development

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
amniotic sac   a tissue filled with liquid that protects the embryo  
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cleavage   the series of changes that take place to turn one fertilized egg into a hollow ball of many cells  
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complete metamorphosis   a series of changes in an insect in which the young do not look like the adult  
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fetus   an embryo that has all of its body systems  
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incomplete metamorphosis   a series of changes in an insect from nymph to adult  
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labor   contractions of the uterus  
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larva   a young animal that looks completely different from the adult  
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metamorphosis   the changes in appearance and lifestyle that occur between the young and the adult stages  
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navel   where the umbilical cord was attached to the body  
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nymph   a young insect that looks similar to the adult  
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placenta   an organ that connects the embryo to the mother’s uterus  
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pupa   a quiet, non-feeding stage that occurs between larva and adult  
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umbilical cord   made of blood vessels that connect the embryo to the placenta  
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